I own an Acer laptop computer with 4 MB of ram and 350 gigabyte hard drive. I purchased a Toshiba canvio 750 GB extra hard drive. The external hard drive takes 4 hours to back up the hard drive on the computer. My question. Is this normal or do I have a problem? I also own a HP desktop computer. I have a Toshiba 750 gb external hard drive attached to it for backup. It takes about an hour for this hard drive to back up my pc. Between the two the laptop is very slow for backup and the PC is very fast. Any help would be greatly appreciated. Thank you